Re: Custom CDC to SID text

Posted by Karlis on Aug 21, 2017; 5:58pm
URL: http://bluesaab-forum.90.s1.nabble.com/Custom-CDC-to-SID-text-tp90p1191.html

I think there's no need to over-complicate things. For now, the whole idea is that BlueSaab=SPA (with regards to SID text control). When BlueSaab is engaged, it requests SID resource access on behalf of SPA. IHU still tries to push through its requests on driver action (button press/track change), but we detect that and start sending our own display requests with "driver action" byte set till IHU "calms down" and then we fall back to "static text" type of text which allows all the other nodes (including Night Panel feature) to take over SID if/when needed.

This whole thing also is needed, because IHU display resource request frame ID is of grater "priority" than SPA request ID, so IHU will always win the arbitration on the bus.